520505720352 has 72 divisors (see below), whose sum is σ = 1516290326460. Its totient is φ = 169270149120.

The previous prime is 520505720323. The next prime is 520505720363. The reversal of 520505720352 is 253027505025.

520505720352 is a `hidden beast` number, since 5 + 2 + 0 + 50 + 572 + 0 + 35 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 513005467536 + 7500252816 = 716244^2 + 86604^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22028577 + ... + 22052192.

Almost surely, 2^520505720352 is an apocalyptic number.

It is an amenable number.

520505720352 is an abundant number, since it is smaller than the sum of its proper divisors (995784606108).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

520505720352 is a wasteful number, since it uses less digits than its factorization.

520505720352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44080826 (or 44080815 counting only the distinct ones).

The product of its (nonzero) digits is 105000, while the sum is 36.

The spelling of 520505720352 in words is "five hundred twenty billion, five hundred five million, seven hundred twenty thousand, three hundred fifty-two".